Texas Instruments TPS65012RGZR

Overview

TPS65012RGZR from Texas Instruments is a highly integrated Li-ion linear charge controller and multi-rail power management IC for single-cell battery-powered systems. It delivers 1-A VMAIN and 400-mA VCORE step-down conversion, two 200-mA LDOs (VLDO1/VLDO2), I²C interface, thermal shutdown, and USB/AC autonomous input selection - deployed in cellular phones and PDAs requiring compact, low-quiescent-power system power architecture.

For engineers reviewing the TPS65012RGZR datasheet, TPS65012RGZR pinout, TPS65012RGZR application, or TPS65012RGZR equivalent, key selection criteria include its dual-step-down converter efficiency at light load, programmable charge current via ISET resistor, LOW_PWR deep-sleep core voltage scaling, and 70-µA quiescent current in full-power mode - all within a 7.0 mm × 7.0 mm VQFN-48 package with exposed thermal pad.

Technical Context

The TPS65012RGZR integrates autonomous power-source arbitration between AC adapter and USB inputs, with internal FETs, current sensing, and precise voltage regulation for charging. Its dual synchronous step-down converters operate at 1.25 MHz with PFM/PWM transition to maintain high efficiency across 10 µA–1 A loads.

Serial control uses standard I²C (100 kHz / 400 kHz) to configure output voltages, enable LDOs, manage power sequencing (PS_SEQ), and monitor status via INT and PWRFAIL open-drain outputs. Charge termination, precharge, taper, and thermal fault detection are hardware-automated with configurable thresholds via external resistors and registers.

Key Specifications

Pinout & Package

The TPS65012RGZR is housed in a 48-pin VQFN package (7.0 mm × 7.0 mm) with an exposed thermal pad that must be soldered to PCB ground for thermal performance and electrical stability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail Li-ion power management applications.

Compared with TPS65023RSBR and BQ24032ARHLR, the TPS65012RGZR uniquely combines charger, dual buck, dual LDO, and drivers in one die - reducing board area by ~40% versus discrete solutions while maintaining 70-µA quiescent current and hardware-autonomous input selection.

Availability

TPS65012RGZR is available at Aetrix Electronics and suitable for cellular smartphones, PDAs, digital still cameras, and internet audio players requiring stable component supply, long-term lifecycle support, and qualified automotive-grade alternatives.

Supply support for TPS65012RGZR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in battery-powered portable electronics.

The TPS65012RGZR belongs to TI's Power Management IC portfolio designed specifically for single-cell Li-ion systems in space-constrained consumer devices - emphasizing integration, low quiescent current, and autonomous operation without host firmware dependency.

FAQ

What is the maximum supported charge current for TPS65012RGZR using the AC adapter input?

The TPS65012RGZR supports up to 1000 mA (1 A) fast-charge current from the AC adapter input. This is set by the external resistor on the ISET pin and can be scaled to 75%, 50%, or 32% of full scale via I²C register CHGCONFIG<4:3>. The device includes hardware-based current limiting, thermal foldback, and charge termination to ensure safe Li-ion charging per JEITA guidelines.

Does TPS65012RGZR support automatic power-source selection between USB and AC inputs?

Yes, the TPS65012RGZR implements autonomous hardware-based input selection: AC adapter input takes priority over USB, which in turn takes priority over battery. No I²C command or host intervention is required - the internal power-path FETs and comparators handle seamless switchover, including reverse-current blocking and input UVLO detection.

How is VCORE output voltage configured on TPS65012RGZR?

The VCORE output voltage on TPS65012RGZR is configured via the DEFCORE pin (pin 1) and I²C register settings. DEFCORE sets default values (0 = 1.5 V, 1 = 1.6 V), while the I²C interface allows fine-grained selection across 0.85–1.6 V in 100-mV steps. The actual output maintains ±3% accuracy across load and temperature, supporting dynamic voltage scaling for processors.

Can TPS65012RGZR operate without I²C communication enabled?

Yes, the TPS65012RGZR operates fully autonomously without I²C. Default configurations (VMAIN = 3.0 V, VCORE = 1.5 V, LDOs disabled) are active at power-up. I²C is optional for advanced features: LDO enablement, VCORE fine-tuning, charge parameter adjustment, and status register reads - making it suitable for both simple and complex system architectures.

What thermal management provisions does TPS65012RGZR include?

The TPS65012RGZR includes junction thermal shutdown at 160°C (with 20°C hysteresis), overtemperature suspend at 145°C, and a thermally enhanced VQFN-48 package with exposed pad. Its RθJA is 27.0°C/W on JEDEC high-K board; proper PCB copper pour under the thermal pad is essential to maintain <125°C junction temperature under 1-A VMAIN load at 85°C ambient.